Improvement in the manufacture of white lead



UNITEDSTATES- PATENT onirica`l HENRY HANNEN, OF PHILADELPHIA, PA.,ASSIGNOR TO HIMSELF, THOMAS WOODS, AND B. F. PINE, OF SAME PLACE.

IMPROVEMENT IN THE MANUFACTURE 0F WHITE LEAD, AND lN THE PURlFlCATlON 0FTHE PRODUCTS` 0F COMBUSTION FOR THE SAME.

Specification forming part of Letters Patent No. 86,835, dated February9, 1869; antedatcd February 1,18t9,

To all whom t may concern:

Be it known Vthat I, HENRY HANNEN, of Philadelphia, Pennsylvania, haveinvented a Mode or Process of Utilizing the W'aste Products ofCombustion; and I do hereby declare the following to be a full, clear,and exact description of the same.

Myinvention consists in utilizing those gaseous products of combustionwhich are usually permitted to escape through chimneys into theatmosphere, by forcing the same through water impregnated with chlorine,or its equivalent, thereby converting them into pure carbonic-acid gas,to be used in the manufacture of white lead, or for other usefulpurposes.

In order to enable others to practice my iiivention, Iwill now proceedto describe a mode of carrying the same into effect, reference being hadto the accompanying drawing, which forms a part of this specification,and in which- Figure l isa sectional elevation of apparatus which may beemployed in practicing my invention, and Fig. 2 a plan view of the same.

A represents part of the chimney of any furnace or fire-place, and a asliding damper, below which is a pipe, b, forming a communicationbetween the chimney and the reservoir B, the said pipe being furnishedwith a valve, c. D is a fan, by means of which the contents of thereservoir are withdrawn through the pipe d, and forced through the pipef into the closed vessel E, the pipe f extending nearly to the bottom ofthe vessel, and having a number of small lateral perforations.

Vfl/Tater impregnated with chlorine is introduced into the vessel E,through the funnel F and pipe G, in such quantities that there shall bewithin the vessel a space, m, for the aecumiilation of the carbonio-acidgas, under pressure caused by the action of the fan. This gas isdischarged and distributed through the pipe K to white-lead-making orother apparatus, in which a pure carbonio-acid gas is available for anymanufacturing purposes.

L is a try-cock, for determining the height of the chlorinated water iiithe vessel E, and

IWI a cool; through which the contents of the vessel may be discharged.

In using the above-described apparatus, the valve c is closed, and thedamper a permitted to remain open until the fuel in the furnace orfire-place is thoroughly ignited, when the damper (dis closed, the valvee opened, and the fan D set in motion. The iinconsiimed gaseous productsof combustion, accelerated by the exhaustive power of the fan, will rushfirst into the reservoir B, where particles of dust and refuse matterare deposited, owing to a screen, h, of perforated plate or wire-gauzeat the entrance of the pipe d, after passing through which the gas isforced through the pipe f, and through the chlorinated water in thevessel E, by which the gas is purified and converted into a purecarbonio-acid gas, available for the manufacture of white lead, and forother useful purposes, the puried gas accumulating, under pressurecaused by the fan D, in the vessel E, from which it is consequentlyforcibly ejected through the distribA iiting-pipe K.

It will be understood that although I have described specic apparatusfor carrying out my invention, the same may be altered and modified, andother apparatus substituted for that explained, and illustrated in thedrawing.

Without confining myself, therefore, to any specific apparatus ormechanism for carrying my invention into effect,

I claim and desire to secure by Letters Patent- The mode or process,substantially as herein described, of utilizing the waste gaseousproducts of combustion, by forcing the same through Water impregnatedwith chlorine, or its equivalent, for the purpose specified.

I i1 testimony whereof I have signed my name to this specification inthe presence of two subscribing witnesses.

HENRY HANNEN. Witnesses i H. HowsoN, HARRY SMITH,

